Ethyl 3-hydroxy-2-nitro-4-(trifluoromethoxy)pyridine-5-acetate
3-Fluoro-6-nitro-4-(trifluoromethoxy)-2-(trifluoromethyl)pyridine
Ethyl 6-hydroxy-2-nitro-4-(trifluoromethoxy)pyridine-3-acetate
5-Fluoro-2-nitro-3-(trifluoromethoxy)-4-(trifluoromethyl)pyridine